Given what you now know, what information is most likely to produce the correct answer?
What will be an ideal response?
Dimerization leads to activation of RTKs, and thus if there are too many receptors on the cell
surface, it is more likely that dimerization and activation of the signaling pathway will happen in the
absence of ligand. This can lead to the inappropriate activation of a signaling pathway that promotes cell
division. Dimerization and autophosphorylation has to occur with RTKs in the same cell. There is no
mechanism for this occurring between two different cells. RTKs are membrane bound proteins that do not
enter the nucleus. Autophosphorylation is necessary for activation of this pathway and thus if
autophosphorylation were inhibited, it would be less likely that the downstream pathway would be active.
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Long, saturated fatty acid tails ______________ lipid mobility and ______________ membrane fluidity
A. enhance; increase B. reduce; increase C. maintain; decrease D. enhance; maintain E. reduce; decrease
Bioaugmentation
A. adds specific microorganisms to the polluted site. B. only enhances the growth, onsite, of the resident population of microbes. C. usually utilizes genetically engineered bacteria. D. is typically done offsite. E. only enhances the growth, onsite, of the resident population of microbes AND usually utilizes genetically engineered bacteria.
. Reversible reactions in a cell rarely reach equilibrium because ____
a. the products are generally reactants in other reactions and are thus immediately used b. a cell at equilibrium is dead c. they are highly regulated to prevent overuse of reactants d. cells have no way of measuring the relative ratios of reactants and products e. conditions in the cell change too rapidly for any reaction to ever reach equilibrium
Ancestors of the Galàpagos finches had two different types of seeds to eat on some islands. Some seeds were very small, and required small beaks to handle, other seeds were very large and required large strong beaks to crack. This led to among the Galàpagos finches.
A. disruptive selection B. stabilizing selection C. directional selection D. sexual selection E. artificial selection